<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="员工姓名" id="i1">
<input type="text" placeholder="工资" id="i2">
<input type="text" placeholder="工作" id="i3">
<input type="button" value="添加" onclick="f()">
<table border="1">
    <caption>员工列表</caption>
    <tr>
        <th>姓名</th>
        <th>工资</th>
        <th>工作</th>
    </tr>
</table>

<script>
    function f(){
        //创建tr和3个td
        let tr=document.createElement("tr");
        let nameTd=document.createElement("td");
        let salTd=document.createElement("td");
        let jobTd=document.createElement("td");
        //给td设置显示的文本
        nameTd.innerText=i1.value;
        salTd.innerText=i2.value;
        jobTd.innerText=i3.value;
        //把td装进tr
        tr.append(nameTd,salTd,jobTd);
        //把tr装进table
        let table=document.querySelector("table");
        table.append(tr);


    }
</script>
</body>
</html>